This is the Devil’s Causeway. It is a rocky ridgeline that narrows down to only 4′ wide with more than a 1,000-foot vertical drop on both sides. You can find this death-defying narrow strip of land near the small town of Yampa, Colorado. If you are up to the challenge, you can walk (or crawl as some do) across this rocky outcropping on a 10-mile loop trail. It is a remote part of the country, but a very popular trail. Arrive early to have the experience all to yourself.